#!/bin/bash
# Arbitrary delay

# simpledelay.sh <arg>
# <arg> is an integer value and specifies the delay interval in seconds

minint=0		# mininum delay
maxint=15	# maximum delay

# Check that only one argument has been submitted
if [ $# -eq 1 ]; then
	# Check that the argument is an integer and in the valid range
	if [ $1 ]; then
		if [ ! $(echo "$1" | grep -E "^[0-9]+$") ]; then
			echo $1 is not a valid integer.
			exit 1
		else
			if ! [ $1 -ge $minint ] || ! [ $1 -le $maxint ]; then
				echo $1 is an invalid value. Range is [$minint-$maxint]
				exit 1
			fi
		fi
	fi
else
	# No args or more than one submitted
	echo "<simpledelay.sh> Not a valid numbers of arguments. Only one argument allowed."
	exit 1
fi

# Execute the delay
delaysecs=$1
while [ $delaysecs -gt 0 ]; do
	sleep 1 &
	delaysecs=$[$delaysecs-1]
	wait
done